While eschewing emotion - and its companion vulnerability - Obama should be careful not to sacrifice empathy the 'I feel your pain' connection that sustained Clinton. This connection is the shorthand people use to measure their leaders' intentions. If people believe you're on their side they will trust your decisions.
I perfectly understood President Obama's attitude throughout the French presidential campaign. He had no reason to distance himself from Nicolas Sarkozy. It's the basic solidarity that leaders who worked together owe to each other.